# 1991 pontiac grand prix fuel filters

**URL:** <https://community.cartalk.com/t/1991-pontiac-grand-prix-fuel-filters/78256>\
**Category:** Maintenance/Repairs\
**Tags:** pontiac, grandprix\
**Created:** [March 25, 2013, 9:52am UTC](https://community.cartalk.com/t/1991-pontiac-grand-prix-fuel-filters/78256 "2013-03-25T09:52:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ogige](https://avatars.discourse-cdn.com/v4/letter/o/f0a364/32.png) [@ogige](https://community.cartalk.com/u/ogige)\
**Post date:** [March 25, 2013, 9:52am UTC](https://community.cartalk.com/t/1991-pontiac-grand-prix-fuel-filters/78256/1 "2013-03-25T09:52:30Z")

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Im working on a 91 grand prix le with a 3.1 multiport engine. It has been sitting in the back lot at work for a long time, Ive changed fuel pump, sending unit, the filter down by the tank and the pressure regulator. I also flushed out the tank with clean fuel. Is the little canister that sits right before the pressure regulator a secondary filter? the haynes book does not even mention it, but i drove it the other night and it ran very strong for maybe a mile and a half then acted like it ran out of fuel. Its the only thing that is left in the fuel delivery system I havent changed. Thanks for any insight anyone might have. Getting tired of bussing to work. Thanks again ogige.

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**Author:** ![system](https://global.discourse-cdn.com/cartalk/original/3X/1/d/1d47c66a543aa6c5a7873bb2320858f978ff52ed.png) [@system](https://community.cartalk.com/u/system)\
**Post date:** [March 25, 2013, 6:54pm UTC](https://community.cartalk.com/t/1991-pontiac-grand-prix-fuel-filters/78256/2 "2013-03-25T18:54:52Z")

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I don’t believe that’s a filter. I believe it’s a device similar to a shock absorber that helps keep noise down. I would be wondering about a plugged catalytic converter. Remove the oxygen sensor when it occurs again. Or test backpressure.